I guess the dragon is ok but the work on the scales is horrible I mean it looks like he just drew the lines in from edge to edge and did't detail it. Look like a good teenager drawing!!!
I don't recomend you cover it up I had 1 cover up and ussually it needs to be al least 2 times the size the one your covering, then what if you don't like it? look at it as a reminder that you have to think twice before doing something you'll later regret
